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Method for inhibiting vortex-induced vibration of novel deepwater drilling riser

A technology for deepwater drilling and risers, which is applied to drill pipes, drilling equipment, drill pipes, etc., and can solve problems such as limited data on vibration damping performance

Inactive Publication Date: 2011-02-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] It is generally believed in engineering that the staggered distribution of buoyancy blocks can help reduce the fatigue damage caused by vortex-induced vibration to the riser, but the data on its actual vibration reduction performance is very limited

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  • Method for inhibiting vortex-induced vibration of novel deepwater drilling riser
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  • Method for inhibiting vortex-induced vibration of novel deepwater drilling riser

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Embodiment Construction

[0011] The invention utilizes the method of assembling buoyancy blocks at regular intervals on the water riser to suppress the vortex-induced vibration of the deep water drilling water riser. The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0012] The new vortex-induced suppression method designed by the present invention is based on the idea of ​​slowing down the vortex-induced vibration by the buoyancy block, and further proposes a new drilling riser vortex-induced suppression method that lowers the bare single riser and the buoyant single riser successively according to the ratio of 3:1. The interlaced distribution of the buoyant single root and the bare single root of the riser is as follows: figure 1 shown.

[0013] figure 2 It is a schematic diagram of the distribution scheme of staggered buoyancy blocks. The distribution of staggered buoyancy blocks mainly considers four schemes: all confi...

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Abstract

The invention relates to a method capable of effectively inhibiting the vortex-induced vibration of a deepwater drilling riser. In the method, a buoyancy-block distribution scheme is optimized according to the influence rule of a buoyancy-block distribution form for the vortex-induced vibration fatigue characteristic of a riser system, i.e. buoyancy singles and naked singles are configured in a staggered manner from top to bottom according to the proportion of 1:3 to promote the response frequency of the deepwater riser system to be together controlled by buoyancy blocks and the riser and avoid the vortex-induced vibration of the system. The method for inhibiting the vortex-induced vibration of the deepwater drilling riser provided by the invention can effectively inhibit the vortex-induced vibration of the riser without installing an additional vortex-induced vibration inhibiting device, shortens the working cycle, saving the drilling cost and realizes the unification of safety and economical property.

Description

technical field [0001] The invention belongs to the technical field of marine drilling operations, and in particular relates to a method capable of effectively suppressing vortex-induced vibration of a deepwater drilling riser. Background technique [0002] The deepwater drilling riser is the key technical equipment for deepwater oil exploration and development, the decisive factor in the design of deepwater drilling ships or drilling platforms, and one of the keys to the success or failure of deepwater drilling. The buoyancy block is an important part of the deepwater drilling riser system, and its main function is to reduce the wet weight of the riser system and reduce the requirements for the tensioner of the riser system. As offshore oil and gas development enters the deepwater field, the vortex-induced vibration (VIV) problem of risers has attracted extensive attention. Vortex-induced vibration is the main factor causing yield failure and fatigue failure of risers, and...

Claims

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Application Information

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IPC IPC(8): E21B17/10E21B15/02F16L55/04
Inventor 陈国明孙友义谢丽婉鞠少栋畅元江王友华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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